Sun Cluster 3.0 software can only provide service for those data services that are either supplied with the Sun Cluster product or set up with the Sun Cluster data services API.
Do not use cluster nodes as mail servers because the Sun Cluster environment does not support the sendmail(1M) subsystem. Mail directories must reside on non-Sun Cluster nodes.
Do not configure cluster nodes as routers (gateways). If the system goes down, the clients cannot find an alternate router and cannot recover.
Do not configure cluster nodes as NIS or NIS+ servers. However, cluster nodes can be NIS or NIS+ clients.
Do not use a Sun Cluster configuration to provide a highly available boot or install service on client systems.
Do not use a Sun Cluster 3.0 configuration to provide an rarpd service.